Apparatus for positioning structural members for drilling and like operations



4 Sheets-Sheet Aug. 23, 1932.

APPARATUS FOR POSITIONING STRUCTURAL MEMBERS FOR DRILLING AND LIKEOPERATIONS Aug. 23, 1932. H, H, McCLlNTlC 1,873,547

APPARATUS FOR POSITIONING STRUCTURAL MEMBERS FOR DRILLING ANDLKRoPERATIoNs A Filed June l, 1928 4 Sheets-Sheet 2 INVENTOR ug. 23,1932. H. H. MccLlN-nc 1,873,547

APPARATUS EOE PosITIoNING STRUCTURAL MEMBERS FOR DRILLING ANU LIKEOPERATIONS f Filed June l, 1928 4 Sheets-Sheet 3 ug. 23, 1932. HMCCUNTIC 1,873,547

APPARATUS FOR POSITIONING STRUCTURAL MEMBERS FOR DRILLING` AND LIKEOPERATIONS Filed June l, 1928 4 Sheets-Sheet 4 1251 Z4 f l Jog ,205...705 ,209 .ZIO

Patented ug. 23, 11932 inn-Jima fHovvARnlH.V MceninT1o,-..oFiPITmsBUReH,PENNSYLVANIA, nifssrenon To Meerlardy MaRsHALL ycoMPAnY, :or'Prr'rsanatoria,nimmerummm,l A CORPORATION" on PENNSYLVANIA ABPAaaA'nUsLnon Posmionme" 'sTUCTURjAFMEMBERs Fon`-nRInINe -ornmrnmnsf r @Thisinvention-'relates toaanapparatusdfor een-tering, rholding tand turn-ingstruetural members topermit' drilling; pnnelnnggrivetf ing; or-like'operati-ons thereon. l n

According to thepresentniethdd of drillinglargeestrnetural shapes, ifthe lwolik xrnust ibe movedabout the drill by hand,'-vvhieh-is 'slfow,

"naeeurategiand expensive. 'H'eretoEoregfit has bers, regardless lofAtheir T`WeightLand size,

whereby the drilling and like v"operationsrna'y o befoeformedexpeditiouslygf'precisely, fandat a minimum cost.

A'Ano'ther" objeetisE to proviidoalniahinef-of thisY fcharafeter capableAoi"lon'gitudinalneovement,y providedj with power-operated jacks-totail; stoks provided Withl novelwvorkeen'gagingzchneks.

A urtherlobjeetis-'to `provide s'ueh annahinefwvherein one oftheehu'eksnray beturned 'to-'rotate the Work and may; inf/anoy-alemannerfbef-seeured'indiil'eren` positions in the pat-hofareirele. Various'a'dditional' obj eets andadvantages wvillf bepointedoutJ orbecome'iapparentfrom a consideration oftheffdescription-followingtafken in connetion :Withithe accompanying drawings illustrating -apractical embo'diment. Y

.'Insaid drawings: i

llis aside4 elevationalviewvfthe inventionl inv Work-'engaging positions 'VFi-g. 2 is 'atop planyiew thereof,4 With the head'and" tailstoeksremoved;

'FigfBis yan enlarged vertical sectional view ofthe Ihead stock,` partlybrokenfaway to' show details; 1

fFig; 51is1any enlarged faceview, showin-gene otthenvorksengaginglchucks engagement i i 1 fFigzs 6" isia'n' enlarged' Vertical sectionalview through one of the lifting jaoksysai'divievv being taken onlineVIe-VI -offFigJ2 pand -f-Fig.l 7 .isis fa Adiagranimatie vvewy.nshowing limitingnneansr for the lifting jacks.k

. "fReerringto 'xthe i-olravvings,l 1'0 ides'ignates 'generallyf'a' bed'orsrmovablesupporting-body com@rising,A asl illustrated,y a eastmetal'- str-uctureI including side-members 11, eonnecte'dat intervals bytransversewvebs orernembers-'1`f2. The bed s :is mounted :forYlongitudinal v m0vement i aiponz azvseries ofl rollers J3, the latterbeingnjournalledi on transversely extending shafts: 14 a proj eetedthrough bearings`v 1155 'of base mnembersszl placed `ion"L the dioororfother support. Y .At 'itfheir *inner'fendslj rollers 13haveiperipheral flanges `which overlap!` the;-` inner e"ffesjoftheflowver portions @18 `voftheiisi-de members ll,vth-us.-zguarding 'against :lateral displacement( of' the bed l0.AThe:aunider y`surfaces :offthe f angles 1' 8 aref eentrallyprovidedWthflongituelinally extendingrrows offraek teeth i19, Idesignedfto'meshwith pinionsfor gear: Wheels i20fkeyed@ to a fshaft 21. jou'rnalledinsuitable bearings. Shaftz21 is driven ff-rom aeinotor;preferablyareversibleveleetriei mo# tor-1 22,1Vthrough1thef medium of speed;lreduc? ingagearing, butgenerallyshovvn. VItvvifll be "real-ized f thatWith the .f niotor'1'22 operating,.;gear wvheels20 through' theirfengagement with racks 19 will cause'l'ongitudinal inoveinentior shiftingofr'thefbedlO.

llfheiwork, for j*which an H #bea-m' ris.' represen-tative,2is :adaptedtobel engaged by-ehueks 25 of raf head steek :126;1and f a tailfstoekff27 .1 Said stoeks ..261xa11'd v"127 :have many s' similar partsfor ffinstan'ce, 7':arriages 128 svvhih :lare sl'ida'ble-al-ong thebedlOiand: have depending. hook flanges i'29 v :engaging the f iupper'anglesv orlheads 130 ofrthes side members ll. -EachV otherwise'astenedfthereto'fat 32, saidi braeke g 1 ets-"eaeh;sf'ournallinaa-fshafteada Jted'zto fFigA, 1s .an enlarged side elevational ViewU J gr befturnefd tlfirough the' operationf'ofwa'hand Wheelfgfl. fKeyedjtothe' shaftf'1 is lfa; pinion Y pinion-jor;fgearvwheelf 'rigidoniashort'fshaft 37, ournalledlin bracket 31, and which shaft 37 alsohas a pinion or gear wheel 38 keyed thereto. Gear wheels 38 are in meshwith rack teeth 39 provided throughout the length lof one of the headson its undersurface.

Journalled in the bodies 43 of the carriages f 28 adjacent their upperportions are shafts Y "er's'pindles-44f Spindles `44gmay have heads 20fchncks' 25 and carry diametri@ blocks 50 prokand cap screws 605. Y

or piates 45' to'which drums V46/are secured 10 by ol'ts`47. The drums46 extend between the inner end vof thte bodies43 vand vertical,

wfa'lls43aiintregral therewith, and which walls mount short shafts 48 onwhich rollers' 49l are journalled and arranged incontact with theperiphery of drumsv46 so as to assist in sustaining the .weight randvstrain f imposed thereon, especially under thef exceedingly-A`heavywork in connection with which the machineisworked. Y. i i

Said drums'k 46 constituteV the bases of vided with centeredlongitudinalT-shaped slots 51 extending completely therethrough.

T-shaped studs 52 occupyand ,are slidably Vmounted in said slotsV 51.Adjusting-screws 53 are centrally journalled,as at 54,'in the Vblocksvand on opposite sides .of their journals 54 have opposite screwVthreads 55 and 56, .onehalf `of said threadedportions beingv receivedkin semi-circular recesses 5605k 'of blocks 50;; Thestuds 52 rest on thethreads 55'and 56;-andfhave corresponding threads meshing therewith, sothat, according tothe i direction of rotating screw 53, the' studs" 52will be moved closer `together or farther apart. v To permit rotation ofsaid screw53, it is provided with square sockets 57 vto accommo'date akeyor turning tool.

r ducedat their overlapping portions so that the upper and lower facesof .the remainder thereof will be in the same plane. Jaws 61 areretained on the members 60 by washer .60a

In order to prevent collapse` or'displacement of vthe jaws 61 when notengaged with work, and particularly when moving relatively thereto, eachupper jaw 61 has `a generally arcuate spring63 fastened'theret'o at 64and' which partially surrounds andre.-

siliently'supports the lower jaw from below.

In addition, fixed lugs or stops 65 are provided ont-he. blocks 52 whichpreclude lowering movement of the vupper jaws 61. Itwill accordingly beseen, especialy fromVV Fig. 5, that when the shaft 53 is turned in onedirection, the threads 55 and 56 will move the studs 52 toward eachother,L so that through' the contact-of the free ends of the jaws 61with thework 24theyfwill spread and engage inl corners of the H-shapedbeam or work 24, thus centering and tightly gripping and holding it. Inorder to release the work, said arealways -free for rotation toaccommodate adjustment of the w'ork. k'The drum andy chuck of the headstock 26, however, are adapted to be securely locked and held indifferent positionsaocording 'to the particular dri'l'lingfor operationsto which thework is to be subjected. In this connection, the H-beam 24is adapted to occupy four different` positions with Yrespect to thedrilling tool,V asconventionallysuggested at 66, and, therefore, fourlocking recesses 67'are provided in the drum 46 of the head stock.Adapted to enter. said vrecesses 67 isa boltior rod 68which is slidablymounted in suitable bearingsl 69 on theihead stockfbodyV -43. yScrewedtothe bolt 68v at 7() are spaced collars 71l and 2.2An lexpansivecoil spring'73 is vpositioned onshaft` 68, between collar 7 land abearing69, tou'rge the projection of bolt68 so that it willvautomatically enter one of the recesses: v67'. Ywhen brought intoregister therewith. 'A retracted lever to move bolt recesses 67 4isprovided at7 4, such lever having a yoke 75 engagin'gthe bolt 68 betweenthe collars71 and 72 'and having one of its arms76l extended andpivotallylbolted or otherwise fastened, at 77, to an anglebracket 78secured to the head stock body43.

,-{In addition, the spindle 44 of the.r head stock hasajworm` wheel 8Okeyed to its' outer endvand which is in mesh with a worm 81 located atthe top thereof. Worm 81-has a vhand wheel `82f secured thereto.'ASaidjworm wheel 80and worm 81 are housed within ja-nd Ypro-Y6.8'outiof, the Y tected by a suitable sectional 'casing 83 fastenedtothe headstockbody 43. Through the turning ofthe hand wheel 82andintermeshing ofvgears 81y and80, when 'bolt 68 ,iseretracted, thespindle 44 of the head stock may be turned "so las to correspondinglyturn its chuck, the work held thereby, randthe chuck and spindleof thetailstock; Y l y f v V1In order to form a supporting meansto initiallyreceivef'the work or l-l-beam v24 and to adjust it vertically forengagement by the chucks of the head and tail stocks, a plurality oflifting acks are provided at 84.y Siaidjacks may consist ofVsupporting.heads or, plates85 on which the work is adapted to restand'which have depending lifting screws 86ri`gid therewith. Alsodepending 1from Vthe plates 85 are guide members 87 s lidably disposedVin housing 88 suitably mountedbetween the side members 11 ofthe. bed.l. Co-acting withfthe lifting screws 86 zare rotatable worm wheels Y 89having extended hubs 90 providedV withan interior worm thread meshingwith the thread ofthe screws86.: Worm wheels 89 ro- -tate-e`nl ballbearings A 59 2 4"snqpported iwithin the -casing 88 and-are?heldeagainstlvertical displacement by'hold-downfpla-tesand-casing-"i942, i v' rl i nforder to rotate` the# worin -wheels 89- in'Lrnison'tfeitherJ raise orllow'er--the screws-186 fa-Idmccordingly the-jacks and `the Twork,\a `power shafti L95' is -1journalledlongitudinally `of thebed1O=and,-at'A intervalgbhasWorrns=96coupled therein, as at v197. The worms i96 are i-nrneshevtfith theperipheral teeth lof' the worm wheelsf89 andeachA-ca'singA 944` isextended: or provided wit-1ra section -98 :adapted to Ahouse and protectthe worrns196- f "A'bralt- 994s; fastened 4to' one end off the bed,-and--niounts an electric motor 100,- Aof the dynarn-icbraking type,preferably-ofthe General Electric type `-R. Ff shunt-wound',AW'=hose=-n1xain shaft drivesagliinion 1101 -disposed in-rneslrwith agear ywheel 102i lreyedft-o the'power shaft95.

@To vghard-against the j acks -84 raising. lor lowering" beyonfd apredetermined rsafev` limit, means'are'proirided to cutout theVoperati-ng motor 100 at-either of `saidl-innits. LIn this con-nectionfacable-0r Adraw element 1103 is fastenedA -at 104 to" one-of theplatforms. or t heads 85 anclisztrained1i1nder-a direction pulley 1 165-Asuitably j our-nailed at 106 on` the bed.10. 'Theilo-wer en-d of-ca-ble10S-isaiasi;- enefd to acounter-weight 107 which is pivote'd at-1G8'tosaiid bed/10.' COunter-weightllO? always-maintains the cablef103 taut.

@Adjustably secured to cab-le 103 -aretrip lugs 199 Aandv'110,-'ajdapted-toengage liinit switches 1111 and 112,l respectively,Vsaid switches being of the well knowntype. "lThe switches areproV-ded'wit-h pivot-ally mountedtrips a and lcontactingar-ins v lb,normally held in -closed position .by-compression springs c. Sourceof;electricalenergy 1l3fis connected :across the movable'inexnber 114of` a doble+t-hrow switchll; y

'As -"shown, switc-h111-2li-mits the downward metion ofvtheijacks484,a-nd switch 111,;t-he

upwa'rdmovement thereof. @ne side of the switch "111 17Vis--connecte'd"by` wire 116 to ene side i118 of the deb-le-throw switchlll, throughthe motor Vand bach` to the opposite Contact .of said switch. Similarly,switch' 112 connects with the Opposite side 1191'0fdonhleithrowswitchY115 by Ia wire 117,

through thernotor-a-nd back to the other side,

o'f thes-Wit'ch i112. Owing tothe fact-that switches lll-andy112-arefnorlnallyl closed, it will be seen that operation-0f the.switch 4115 willoperate motor 100 to `raise orlower the jacksl84.

Assnrning-thatf-the closing of side 118 of im the switch l115 will-causethe inotor lOOfto raise the'j-acks 84, it will' be Seen that when thedesired height -is reached, triplug `109will break `*the Acircuit4through switch 111, caus- V, motor 100; to stop, thereby 4stopping YtheJacks, I'Upon "engaging side v:119V of 4switch directi-on, 'Llowering'the i jackslentils-stopped byf tripAJ lirgfll'()l engagingswit`c-h'1112.l #The Yswitchi 115 l may' be lopened by' the operatorwatany time, 'thus pnoviding a tlexible control of theinaChine.` p f y f lFastenedf to one piti the si'deanembers '-11 Aadj acentf'its Itop aresupp'orting .brackets .1120 4which mount/atempletl 1'211-to-a^i'dimpositioning or centering 'the structure relatively Ito'theldrill'`66.` y' Y e Presti-ming' operatiomjthe workfsuch asian t.lLbea1n24, is flewered ley-1a craneor lotherwise-onto' theiheadsiofthe-jacks 84. Such H-bearrr24 Laslaccenanro'datedl'by the presentmachine is exceedingly heavfyanfd of a weight heretofore 1 `considered`f impractical ifor hansozas-to drive'thepower shaft throughf themedinmof theegears-101-and102 f'Such-powy en shaft-95,4 through themedium eworms 96 and wor-1n'- wheels I`89, causes the lifting-*screws 96to elevate, in orderj to elevate theuwyerl 24 to'` the preper'*` heightfor 'engagement atf its oppositeendsby the chucks 25foffthef-head andtail stocks 26 and 27, respectively. l/V-hen the work 24vis at theproper height,ithe circuit .1 through tlfi-c1ncter '-100' lnaybe brokenas tov move thee'stndsl 52' towarfd each other in order tolallofw chuckjawsilfto embraceland hold thebearn or-w-erk24. "Thereupon,4 the `meter22 may beset inoperation in order-that thrcugh the medium of gearwheels'y 20 `and their co-action `with racks F19,l the b-ed 1O- `andparts menait-edthereon` ina/y he moved `lea-gi# tudinallylto theproperposition for-engagework 24 may be turned =abontahorizontal axis whichisV theaxis of spindles-44, inl order to presentV 4Vari-'eus 'faces or@surfaces ,of the work 24for-engagement by -the drills A1or punches 66.L l l l A The specific work shown. iseadaptedrto y0ccupy'four dilferentpositions in a circle-about the horizon-tal axis mentionedtand t helocked in -each- `one of them: by the vengagement :of bolt;68. in thecooperating; recess 67. VInorder to,r.0tate the Work 24 about the'horizontal axis, 4 the :jacks- 84: are lowered @and `,then the lever;74 `isactuated .to retract thefboltfSv,v whereupon .hand Wheel 82y isfoperated to `drive worin 8,1, worm ywheelBO, ,and spindlev 44,

Ichiicks," andthe Work. KW'hen thebltS'is f" i' `out of register withthe recesses'?, the drum Q46 of the vhead stockis free to be turnedapart of a revolution or until one ofthe recesses 67 registersy with thebolt 68, when it is automatically projected by the spring 7 3 1nto suchrecess 67, thereby stopping the rotative move- -ment. :lt will beunderstood that the raising and lowering andthe limit of travel ofthejacks 84 is controlled by the mechanism here- .fcision, and undercomplete control' at all times. The rollers 49 afford a very efficientreinforcing support forfthe chucks and associated parts, especiallyunder the vweight i of the'worln-since they are located adjacent theends of the work or zone of engagement of the chucks therewith. v Y Y.

,Various changes may be resorted to, provided-they fall .within thespirit and scope of the invention. i

I claim: n f l. In apparatus of the class described for holdingandpositioning elongated structural members for perforating operations,a lon itudinally movable bed, power operated jac s carried by said bedto engage the work, `and means on said bed engageable with the work andoperable to turn thejsame about an aXis passing longitudinally thereof,saidjacks being operable to positiontheworkin substan-v tial alignmentwith said means. g

i 2. In apparatus of the class described for holdingV and positioningelongated structural members rfor pei'forating operations, a bed, powermeans to' longitudinally move said bed, jacks on said bed to engagethework, means onsaid bed operable to simultaneously actu-,l

ate said acks, and means on the'be'dvoperable to `turn the work about anaxis passing lon-V gitudinally thereof, the operationyof the jacksserving to substantially align the Work with the last mentioned means.

3. Inapparatus of the class described for holding andv positioningelongated structuralY f members forperforating operations, a bed,

mea-ns operable to longitudinally move the bed, jackson said bedf forengagement by ther work, means Aoperable toV simultaneously Y operatesaid jacks, a head stock and` Va tail stoclnone of vsaidl stocks beingmovab'lelongitudinally ofthe bed, said acks also serving to support thework during perforating. operations, each of said stocks having chucksto engage 'the-work, the operation of the jacks' serving tosubstantially align the 'work' with said chucks, means 'to turn thelchucks' to accordingly turn work, andmeans tosecure/k the 'chucks andworkat different'positions to which same vmay loe-turned.V j

4. An apparatusof the' lass the jacks serving to substantially align thev.

work with the chucks, said yjacks falso serving to support the workduring perforatf,

ing operations, and means mounting ,the chucks for turning so that theposition of the work may be varied.l i 'I i I 5,. An apparatus oftheclassdescribed for holdingand positioning elongated structural`members for perforating operations compris? ing rollers havingperipheral-flanges, means mounting said rollers, a bedrmountjedon saidrollers and held against lateral displacement by said flanges, meansoperable to bodily.-

move the bed over said rollers, said bed having head stocks slidablealong said Abeds/and having hooked flanges' engagingy the same, means onthe stocks and engaging thebed operable to move the stockslongitudinallyof the bed, chucks carried by the stocks fand adapted torotatablyv supp-ort the work, and jack means carried by .the Vbendadapted to receive the work in substantially horizontal position, andpower means to operate the jaclzV describedrifory Y holding andpositioning elongated structural n s means so as to align the work forengagement bythechucks.A ,A ,f Y 6. A work-cradle mechanism for `holdingand positioning elongated vstructural memv 'i'o bers for perfo-ratingoperations of the lclass described: comprising a bed, power means tolongitudinallyr .move the bed, supporting means for the work mounted onthe bed,

stocks lmounted on the bed, said stocks having spindles journalledtherein,y v drums carried by the spindles, chucks carried by saiddrumthe Aends of the work and Vrollers carried by @the stocks in peripheralengagement with the bers for perforating operations comprising a;

bed, power means to move the said bed-longitudinally, Jack Vmechanism:tof support the Work, said jack mechanism having screws,- worm wheelsjournalled on the bedrfhaving' threaded engagementwith Vsaid screws, a

power shaft havingworms in mesh` with said worm wheels, means to.loperate said powerr shaft, stocksmounted on said bed,

chucks carried by the stocks yand engageable with the work, theworkbeingoperable byvr the )ack mechanism to positionthe same horiL-g,

.and turnableon a horizontal aXis to engagey f zontally in alignmentwith the chucks, `means operable to turn .one of said chucks aboutamaxis extending longitudinally ofthemachine,

and a lock means engageable withl said chuck to hold it atdifferentadjustments.

dinally, ack mechanism. to support the,work, said jack mechanisml havingscrews, Vworm wheelsfjournalled on thebed having threaded.,` engagementwith said screws, apower: shaft having., worms in mesh with said, wormwheels, means to operate4 saidV powershaft,

stocks mounted on saidbed, chucks. carried by the stocks and engageablewiththe work,

the 'workbeing operable bythe jack mechanism to position .the samehorizontally 'in alignmentwith the chucks, .meansoperable to turn one ofsaid chucks about anaxis extendinglongitudinally of the machine, said4chuck having a plurality of recesses arranged,

in a path concentric with its axis, a locking..V bolt to engagesaidrecesses, means operable to retractfthe` said bolt, and 4meansurging pro-,

havingfilifting'screws, gear wheelsengagingfr jection of said bolt. Y

9. A work-cradlemechanism of'thecclass. described comprising a Vbase,rollersgrjournalled thereon, a` bed having* sidemeinbers engaging saidrollers, said side-members at their lower portions having racks, power'driven means engageable with saidracks to impart .longitudinal movement'to the bed,

4work-engaging jacks carried by the bed be tween said side members,saidjacks having,- lifting screws, worm lwheels yengaging said screws andmounted on the-base against vertical'moveineiit, a power shaft on saidbed having worms in mesh with the first mentioned worin wheels tooperate the jacks,AVA

stocks slidable on the heads of said side members Aand having hookflanges `engaging s id heads, the under surface of one of said heads`having rack teeth, mechanism on each stock engageable with said rackteeth through operation to cause longitudinal movement of the stocks,chucks engageable with the work and rotatably mounted on said stocks.

l0. A work-cradle mechanism of the class described comprising a base,rollers journalled thereon and having peripheral flanges, a bed havingside members engaging said rollers and prevented from lateraldisplacement by said flanges, said side members at their lower portionshaving racks, power driven means eiigageable with said racks to impartlongitudinal movement to the bed, work engaging acks carried by the bedbetween said sidg members, said jacks having lifting screws, gear wheelsengaging said screws and mounted on the base against lvertical movement,a power shaft on said bed having gear wheels in mesh with thefirstmentioned gear wheels to operate the jacks,

Y erable. toA turn. said;

stocks slidablewonthe heads of said: .sidef l members and'havinghookflanges engaging` of the stocks, chucks rotatably mouiited'on# saidlstocks and engageable with the work,

means associated with one of the chucks hav-y ing. recesses in -a rowconcentric with itsaxis,

a lockingtbolt engageable with said recesses, means urging projection ofsaid bolt,means operable to retract said'bolt, `and means: opi Jretracted.

11. A work''cradle mechanism of the class chuck when said bolt isdescribedA` comprising. a base, rollers ours!" nalled thereon and havingperipherak ianges, a bed having side members engagf ing said f rollersland prevented 4from lateral displacement by said flanges, said sidemembers at their lower portions having,;r2 icks,f, I

power driven 'means engageablelwith said racks to impartlongitudinalinovement to the bed, work len gaging carriedby` the bedbetweensaid side,4 members, said jacksl heads having rack teeth,mechanism on eachstock' "engageable with said` racky teeth i throughyoperations Lto vcause` longitudinal Y movement-of the stocks, chucksrotatablygl theawork, said chucks each having two pairs [mounted onjsaidlstocks and engageable-fwith of'fpivotally mounted jaws, means holding@vone `of the jawsof each pair against displacement,when-disengaged withthe work,;and-

an ,element extending.v from' the last'meni tioned 'jaws andembracingthe co-acting jaw 1 to preventI displacement thereof whendis-,.- engaged with the work; Y

12. Iiifapparatus of the class described forholding. and positioningelongated structural f members for. perforating ope-rations,-i

a bedhavin-g. a rectilinear movement, vera tically movable jack imechanism carried by the bed to engage: the work, an electric pzowi`4 ermotorqfor'movingithe jack mechanism "to substantiallycenter the work,means for limitingzth'e movementjof said jackmechanis'm and means,` onA.the bed VA'to support and permitff turning of the work? abouty an axispassingw longitudinally thereof," i said limiting means Y including alweighted cable' secured lto the jack?mechfanism,"A an -electricfcircuitleading to thesaid motor,v amswitch mechanism, and

stops adjustable on: thecable co-actin`gjwith thesw'itcliinechanismwhereby the work may` be4 raisediinto substantial.`valignment with j the second mentioned means. v v

13. In apparatus of the'class 'described for holding. and positioningVelongated I struc- 5tural members for .perforating operations, arectilinearly movable bed, mechanism 'Yon said bed to support work 'andpermit turning thereof .on its axis to different positions, means tosecure the work in said kdiEerent lopositions, and mechanismen ythe bedoperable to jack the work intol substantial alignment with and forengagement by the first mentioned mechanism.v v

14. An apparatus of the class describedfor holding and positioningelongated r structural members for perforating opera-` tions consistingo a basevhaving rollers, a bed having sidemembers disposedonrsaidYrollers,'rack teeth on onev of the side mem- Y 2or'bers, meansengageable with the rack teeth andfoperable to bodily movesaid bed, jackymechanism on they bed to engage'the work,

means on the bed to operate said'jack mechanism,mounting members'onthe'bed having chucks engageablel Vwithy the ends of the work, v

one of said members being a slide,.mea1`:lsvr operable to bodilyfmovesaid v'slide' on said y bed, means ymounting the chucks'for turning" vona` horizontal axis so that' the position of the work may be varied, andmeans for securing'one'of the'chucks in different positions to which itis turned.

115. A work cradle mechanisml forholding with the work, the work beingoperable by the jack mechanism to position the same hori- Zontall'ysubstantially in alignment with the chucks, means operable to turn Voneof-said chucks about an axis extending vlongitudinally of the machine,and means to hold the latter chuck at different angular positions. s 16;An apparatus of the `classl described Y 5 for holding and positioningelongatedstruc-` turalmembers for perforating operations,

comprising rollers, a bed mounted-'on said Y 17 .l Aniapparatus bof theclass described@ for holding rand positioning elongated structuralimembers 'for perforating operations, a f

rectilinearly movable bed,mechanism on'said bedy to support' work andvpermit turning thereof on a substantially horizontal axisto Y differentpositions, mechanism on said bed' whereby theV work maybe jackedinto'position for engagement bythe first mentioned mechanism, and meansoperable automatically kto cut oi'the operation of the second' mentionedmechanism when the workvis subi stantiallyl aligned with theirstmechanism; 18. An apparatus of the class described for holding andpositioning elongated structural membersjfor. perforating operations, abed having a rectlhnear movement, vertically `movable ack mechanismvcarried bythe bed to engagethe work, an electric power motor'formovingthe .jack mechanism to sub-Y stantially center'the work, means forlimiting the movement of said jack mechanism, j means on the bed tosupport and permit turn- 'i ing of the work about an axis passinglongitudinallyxj thereof, said limiting means including a weighted cablesecured to the jack mechanism, an electric circuitA leading to the saidmotor, a switch-mechanism, and stops adjustable onvthe ,cable coactingwith kthe switch mechanism whereby the work may be raised into alignmentwith the second mentioned means. y

19. A work cradle mechanism of the class described for holding andpositioning elongated structural members for perforating op- Verations,comprising avbed, power means to longitudinally move the bed,jackcmechanism for the work mountedfon 'the bed, i

gslidable stocks mounted von the bed, a drum Vrotatably mounted on yoneof'said stocks,- av

chuck mechanism carried'by the drum.v

ln testimony whereof I aflix my signature. HOWARD H. MCOLINTIC.

rollers, flanges for preventingv lateral movement of the bedion therollers, means operable A to bodily vmove the bed over said.rollers,said

and jack means carried bythe bed adapted Vto receive' the workinsubstantially hori- Y zontal position, and power means to operate theJack Vmeans so as VVto' substantially align 7 65 thelwo'rk forengagement vby the chucks. Y.

